Large urban areas - over 1 million and less
than 3 million population.

Medium urban areas - over 500,000 and less
than 1 million population.

Small urban areas - less than 500,000
population.

a Percent changes were calculated using the numbers in this table
and were not obtained from the source. Ranks are based on the calculated
percent changes with the highest number corresponding to a rank of 1.

NOTES

"Wasted" fuel is the difference
between the fuel consumed under estimated existing conditions and the fuel
consumed under free-flow conditions. Previous editions of this table were
calculated on the basis of total fuel consumed during congested trips.
Calculations are made for peak period speeds and for free-flow speeds on both
the freeway and principal arterial systems. For a more detailed description
of the formulas used, see the source document.

The urban areas included are those containing
over 500,000 people and several smaller places mostly chosen by previous
sponsors of the Texas Transportation Institute study on mobility.

Methodology and data sources have been
changed in 2010 and were applied retroactively to past years, these figures
are not comparable to those in past editions of NTS.

SOURCE

Texas Transportation Institute, Congestion Data for Your City, Excel spreadsheet of the base statistics for
the 101 urban areas and population group summary statistics (College Station,
TX: 2011), available at http://mobility.tamu.edu as of Mar. 10, 2011, and personal communication,
Mar. 17, 2011.